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Expansion valve adjustment (pump pressure)
Beneath the front panel, near the water/steam nozzle, there is an adjustable valve
(1)
which allows the pressure of the coffee delivery pump to be adjusted.
To adjust the pressure, do the following:
x
Fill the filter holder with the correct grade and quantity of ground coffee.
x
Reattach the filter holder and start coffee delivery.
x
Wait for the pressure gauge to display a stable pressure value and turn the
adjustable knob on the valve.
x
Turn in a clockwise direction to lower the pressure in the circuit and
anticlockwise to increase the pressure in the circuit.
It is recommended to adjust the pressure in the circuit between 9 and 10 bar.
1
